About this calculator
A US gallon is exactly 3.785411784 litres; a UK (imperial) gallon is 4.54609 litres. A US cup is 236.588 ml, and a US tablespoon holds three teaspoons.
Worked example
2 litres is 0.528 US gallons or about 8.45 US cups.
How to use the volume converter
- Enter the value.
- Choose the from.
- Choose the to.
- Read the result — it updates as you type.
Frequently asked questions
How many litres are in a gallon?
A US gallon is about 3.785 litres; a UK gallon is about 4.546 litres.
How many millilitres are in a cup?
A US cup is about 236.6 ml.